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Spectrum sensing is a key component in cognitive radio networks. The existing results so far primarily focus on single primary user detection. Little is known in the most practical and critical setting when multiple primary users exist. In this paper, we aim to address this problem by studying an optimal detector in the presence of multiple primary users. Specifically, a simple and accurate analytical...
Eigenvalue based detection is an ideal solution to spectrum sensing problem in cognitive radio networks. However, results on its sensing performance are very limited. In this paper, we analytically investigate the sensing performance of the eigenvalue ratio based detection. Firstly, a simple and accurate Gaussian approximation to the extreme eigenvalue distribution is proposed. Secondly, a closed-form...
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